1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 49Get this manual
MAINTENANCEfTUNE UP Fuel System Carburetor Adjustments
DO NOT attempt to perform carburetor adjustments with the engine attached to flush kit or inaccurate adjustment will resultIdle speed and low speed mixture screw adjustments should only be performed in test tank or in the water while secured to trailer or dockSee page 3.653.66 before making any adjustments to the mixture screws
Idle Speed
12Adjust idle speed to specificationsStart engine and warm to operating temperature in test tank or with the craft safely secured to trailer or dock